changed DPI handling: dpi is now pushed into every control and saved there

1 files changed, 13 insertions, 5 deletions

diff --git a/alf/alf.cpp b/alf/alf.cpp
index deffd1a..30a998c 100644
--- a/alf/alf.cpp
+++ b/alf/alf.cpp
@@ -174,16 +174,24 @@ ALF_GetModalResult(HWND win)
 }
 
 int
-ALF_CentipointsToPixels(HWND win, int cptValue)
+ALF_CentipointsToPixels(int cptValue, int dpi)
 {
-    return (int)SendMessage(win, ALF_WM_CENTIPOINTTOPX, (WPARAM)cptValue, 0);
+    return MulDiv(cptValue, dpi, 7200);
+}
+
+int
+ALF_GetDpi(HWND window)
+{
+    return (int)SendMessage(window, ALF_WM_GETDPI, 0, 0);
 }
 
 void
 ALF_ResizeWindow(HWND win, int cptWidth, int cptHeight)
 {
-    int pxwidth = ALF_CentipointsToPixels(win, cptWidth);
-    int pxheight = ALF_CentipointsToPixels(win, cptHeight);
+    int dpi = ALF_GetDpi(win);
+
+    int pxwidth = ALF_CentipointsToPixels(cptWidth, dpi);
+    int pxheight = ALF_CentipointsToPixels(cptHeight, dpi);
 
     ALF_ResizeWindowPx(win, pxwidth, pxheight);
 }
@@ -408,7 +416,7 @@ ALF_ShouldMessageBubble(HWND hwnd, UINT msg, WPARAM wparam, LPARAM lparam)
     if (!GetParent(hwnd))
         return FALSE;
 
-    return msg == ALF_WM_CENTIPOINTTOPX
+    return msg == ALF_WM_GETDPI
         || msg == WM_COMMAND || msg == WM_NOTIFY
         || msg == WM_MEASUREITEM || msg == WM_DRAWITEM
         || msg == WM_CTLCOLORBTN || msg == WM_CTLCOLOREDIT